My favorite is Webs. It's great at displaying information and has forums.
After that, I also prefer Wetpaint. It's a lot like Webs in my opinion. It displays info well and I think it has forums.
Weebly is alright. Although I don't like that it doesn't have forums, but that's just my opinion. But it's good at displaying information, but doesn't have forums.
Personally, I don't like Proboards. It's kind of confusing to me.
And I've never heard of Forumotion. .3.